Throttling device for internal combustion engines



Oct. 3, 1933. 0. WINTER 1,929,010

THROTTLING DEVICE FOR INTERNAL COMBUSTION ENGINES Filed Feb. 11 1931 I1 40 I 43 I I7 v I V 11 .lil' ll I 6 Patented Oct. 3, 1933 I v I UNITED STATES PATENT OFFICE THROTTLING DEVICE FOR INTERNAL COM- BUSTION ENGINES Otto Winter, Hlmmelkron, Germany Application February 11, 1931, Serial No. 515,037, and in Germany February 13, 1930 3 Claims. (Cl. 123-496) My invention relates to throttling devices for ing my invention is illustrated diagrammatically internal combustion engines. by way of example.

It is an object of my invention to provide an In the drawing automatic control for an air throttle or choke Fig. 1 is an elevation of the device with the valve. To this end I provide means for operating cover of the cylinder removed, the throttle which means is controlled by the lu- Fig. 2 is a plan view, and bricating oil of the engine. Fig. 3 is a section on the line IIIIII in Fig. 1. In a preferred embodiment of my invention I Referring now to the drawing, 1 is the air provide a cylinder with a barrel therein which is suction pipe of the engine, 2 is the air throttle secured on the shaft of the air supply throttle or choke valve in the suction pipe, 3 is the throtand equip the barrel with a vane or piston which tle shaft, and 4, 5 are its bearings in the pipe 1. is fitted to slide in the cylinder. Rotation is im- 6 is the cylinder which may be integral with, or parted to the barrel by connecting the chamber secured to, the suction pipe 1, '7 is a barrel on of the cylinder in which the piston slides with the the shaft 3 which makes a tight fit in a circular lubricating system of the engine. recess 8 of the cylinder 6, and 12 is a vane or 7 The vane or piston is so pitched with respect piston on the barrel which is mounted to slide to the air throttle that the throttle is in its closin a chamber 11 of the cylinder 6 as the barrel ing position when the piston is in its initial posioscillates. 9 and 10 are pipes at the lower and tion. When the engine is started oil from the upper ends of the chamber 11, respectively. The pressure lubricating system begins to flow in the pipe 9 is connected to the pressure oil supply 5 cylinder and the barrel is rotated, opening the air line and the pipe 10 is connected to an oil filter throttle until the piston strikes a check in the or a return line to the sump by suitable pipes, cylinder. In this final position of the piston the not shown. 13 and 16 are checks for limiting the throttle is full open. stroke of the vane or piston 12 in the chamber 11, When the engine is started the oil is cold and the barrel 7 being recessed at 17 for the recepcomparatively thick. The consequence is that tion of the check 16. 15 is the cover of the cylthe air throttle or choke valve is opened more or inder 16. 14 is a deflector extending from the less gradually in conformity with the viscosity upper end of the lower pipe 9 toward the edge of the oil and rich mixture is supplied to the enof the barrel '1. gine for a period which is a function of the vis- Fig. 1 shows the parts in their initial or startcosity. The rich mixture is favorable for starting position. The throttle 2 is vertical, the piston ing. Later on when the oil becomes warm and its 12 is at the lower end of its stroke. When the viscosity decreases the throttle is operated in the engine is started oil is admitted to the lower face usual manner and the engine is supplied with of the piston 12 by the pressure lubricating system 35 normal mixture. and gradually moves the piston upwards until it When the engine is shut down the air throttle strikes the upper check 13. In the upper final is closed automatically by the one-sided gravity position of the piston the air throttle 2 is full action of the piston on the barrel, or by a spring open. When the flow of the oil ceases the piston or the like. v is returned to its initial position in which it is If the lubricating system of the engine fails arrested by the check 16, as shown in Fig.1. The the air throttle is not operated and the engine piston 12 returns to its initial position by gravity cannot start because its sparking plugs are fioodor means, not shown, such as a spring, may be ed by the excess of fuel supplied with the rich provided for returning it. mixture. If the system fails while the engine I wish it to be understood that I do not desire runs the same will occur so that under all condito be limited to the exact details of construction tions operation of the engine without lubrication shown and described for obvious modifications is prevented. will occur to a person skilled in the art.

If the oil becomes too thin the engine is not In the claims amxed to this specification no lubricated properly, as the pressure of the thin selection of any particular modification of the oil is not able to operate the air throttle properinvention is intended to the exclusion of other ly, and it may even fail to operate the throttle modifications thereof and the right to subse at all. The engine runs irregularly which will quently make claim to any modification not covbe noticed by the driver, or it stops altogether. ered by these claims is expressly reserved.

In the drawing afiixed to this specification and I claim:

55 f rmi p thereof throttling device em y- 1. An automatic fuel mixture control device for internal combustion engines comprising an air throttle, and means controlled by the lubricating oil of the engine for operating said air throttle.

2. An air throttling device for internal combustion engines with a pressure lubricating system, comprising a suction pipe, a throttle shaft mounted to rotate in said suction pipe, an air throttle on said shaft, a cylinder on said suction pipe, a barrel in'said cylinder secured on said shaft, an oscillating piston in said barrel mounted for partial rotation in a chamber of said cylinder, and means connected to opposite sides of said chamber for admitting oil from the pressure lubricating system of the engine to opposite sides of said piston.

3. An air throttling device for internal combustion engines with a pressure lubricating system, comprising a suction pipe, a throttle shaft mounted to rotate in said suction pipe, an air throttle on said shaft, a cylinder on said suction pipe, a barrel in said cylinder secured on said shaft, an oscillating piston in said barrel mounted for partial rotation in a chamber of said cylinder, checks for limiting the stroke of said piston, and means connectedto opposite sides of said chamber for admitting oil from the pressure lubricatinglsystem of the engine to opposite sides of said piston. 

